What size belt should I use?

SCcobra4me

ON3 U LUZ
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So my new setup will be a 2.76 upper, 4# lower, billetflow idlers (3 100 and 1 92) and the 3.2 alt pulley. I checked Billetflow's site but they had the belt size with ???? in it. Any help would be great, thanks.
 

JuStAkId

Just roll with it
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Gates K080797hd is the belt you want (buy it online ebay/amazon Cheapest)

I have the same set up you do but with a 2.8 upper pulley. 4lb lower. 3-100mm and 1-90mm. Also The bottom idler is in the top position on the lower bracket
 

JuStAkId

Just roll with it
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http://www.svtperformance.com/forum.../701866-2-76-4lb-lower-3-2-alt-belt-size.html

Found this thread, looks like 78 5/8 or 79 will work and are tight. Basically same setup as the #3 poster and he mentions dropping from an 80" to a 79".


I had a 79 with the stock 90mm idlers with the 100mm aux idler and the lower idler in the lower position and it worked. When I switch to all 100mm idlers and the one 90mm and moved the lower idler to the upper position I had to switch to the one I mentioned above. I have a Gates Hd green 79'' belt with only dyno time I will let you have for cheap. Just pm me
 

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